Sonarr Phantom preview (alpha) is currently in testing, and the developers are looking for feedback. A lot of Sonarr users have it installed in an armhf environment, and the linuxserver armhf images are well regarded. Creating an armhf version of the preview (https://hub.docker.com/r/lsiodev/sonarr-preview/) would allow these users to contribute.
Of course, I’m not an expert and there may be some simple way in which the existing docker could be made compatible by me - if that’s the case please feel free to berate me for being uninformed (but please also tell me how to do it so I can help test).
Thanks 